Rotary scrubbing brush



Nm@ E@ i192@ QZ R. ANDERSON ROTARY SGRUBBING BRUSH Filed Deo. 29, 1924 2Sheets-Sham l alu f if Y:

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Nov. V16 1926. 1,606,821

R. ANDERSON ROTARY ySGRUBBING BRUSH File-@DcA 29, 1924 2 sheets-sheet 2mig?.

Patented Nov. i6, 1926.

ROY ANDERSON, 0F ATLANTA, GEORGIA.

ROTARY SCRUBBING BRUSH.

Application :tiled December 29, 1 924. Serial No. 758,691.

-This invention relates to a revolva'ble brush of that class wherein acircular brush is rotated a low of water under pressure through aturbine wheel or the like secured to or connected with the brush head.These brushes may be of fibre or bristle tufts when required for washingrailway vehicles or automobiles, or of metal wire when used forscrubbing or removing barnacles or marine growths from the bottom ofships. v

The improvements are directed to obtain a maximum efficiency from thewater ap plied with a free delivery of the water discharged through thehead of the brush to the surface being washed. It is also designed todeliver such proportion of the exhaust water as passes into the annularclearance space between the brush head and the casing through a port inthe flanged outer edge of the casing on the surface being brushed,instead of havingl it spread all around the brush by the centrifugalaction of the brush head.

There are several other incidental features of improvement to whichattention will be drawn in the following specilication, referencebeingmade to the drawings which accom any it, of which:

Figure l slows a section of the brush in its simplest form.

Figure 2 is a sectional plan on the line 2-2 in Figure l.

Figure 3 is a development of the section on the line 3 3 in Figure 2.

Figure l is an inverted plan of the exhaust fluid directing baille.

Figures 5 and 6 show a modification of the brush casing in section andplan.

Figure 7 lis a cross section of a further modilied form of brush.

Figure 8 is a detail plan View. of a single blade or vane.

Figure 9 is -a cross section taken on the line 9-9 on Figure 8.

ln these drawings 2 represents the brush head in Vwhich the brush tufts3 are firmly secured in any suitable manner. rllliis head 2. isrotatabl.' mounted on a pin et secured the close top vci? a casing '5,the outer edge of which is downwardly langedas at te approximately thelevel of the underside et the brush head The bearing oit the hub of thebrush head on the cover 4 has -a ball bearing 7 to receive the pressureimposed on the brush in'use.

The tufts 3 or scrubbing part of the brush are grouped in concentriccircles, the -outer one adjacent the outer `edge of the brush head andthe linner circle adjacent the pin l on which the head 2 rotates.

A series of 'apertures 8 pass through the brush headv 2 between theouter and inner concentric tufts 3', leaving bars 9 between themconnecting the o uter portion of the head to the inner or centralportion.

Curved vanes -lO are secured to or integral with the upper side of thebrush head 2, which blades are adapted to receive a jet of water issuingfroman aperture 11 directed angularly from the hollow cavity 12 in thehandle socket 13.

The luid by which the wheel is operated is thus directed angularly onthe vanes and the energy of its impact thereon rotates the brush head:2. The -fluid, which has acted on the vanes 10, escapes through theapertures 8 of the brush head and assists thewashing action of the brushrevolved by its agency.

To ensure delivery of the greater part ot' the water through theapertures 8 of the brush head after that water has done its work on thevanes l0, a' baille or check lli. projects downward from the nnerside ofthe top of the casing 5 immediately over the circle of the apertures 8of the brush head, and approximately opposite the water jet deliveryaperture 11. 'l`he surface ot' this projection 16 is concavely curvedopposite the direction of ,rotation of the brush head and in crosssection is concavely curved across its width to receive the backwardlydirected flow of water from the inner edges of the blade lO as they passthe jet aperture l1 and to direct that flow downward through theapertures 8 of 'the brush head as they rotate past it.

Y To further facilitate such water delivery through the brush head, theshort arms 9 which separate the apertures 8 and connect the outerportion of the brush head; to the central portion of the same, areproximately tangential to the check 16, as shown Figure of the diam ing,

As a certain amount of water will unavoidably be carried by the vanes 0rbuckets and by the brush head past this check 16 and will, bycentrifugal force, be thrown outward against the downwardly turned edge6 of the casing 5, an aperture 15k is provided adjacent theopposite'side of theccasing from the jet aperture 11, which aperture isapproximately tangential to the outer circle of the brush head. Throughthis aperture 15 any water thrown oli b the head within the casing willbe projected outward where it will not embarrass the user of the brushbut will help to clean the surface he has washed, or will wash dust orthe like from the surface he is about to move the brush over.

Secured to and projecting downward from the head of the pivot pin 4 is astud or knob 17 of rubber or the like material which is designed tolimit the amount of llexure that can be imposed on the brush itself. Iftoo much pressure is applied to the brush it is not only less effective,but subjects the brush to injury. It also imposes too much resistance torotation and slows down thespeed and the pressure onthe brush hasto berelaxed to enable the speed to be recovered, thereby causing a loss oftime. The central studl 17 limits the 'iexure to which the brush tuftsare subjected and be ing applied to a non-rotatable part of the brushopposes no resistance to its rotation.

In cases where it is not desirable to have modified as shown in Figures5 and 6 of the drawing, where an annular baille 14v curves downward andinward from the top of the casing 5 toward the' inner circle of theapertures 8 of the brush head, and the wall 6 of the casing is curvedoutward from the top of the brush head and at a position approximatelyopposite the jet delivery 11 merges into a channel or passage 18 formedin the casing 5, and following a sp'iral in the direction of rotationdelivers into the annular space between the inner edges of the turbineblades 10 and the baffle 14.

With this provision the water thrown by contrifugal action from thebrush head and its vanes 10 will find an exit through the spiral channel18 described and will be directd through the apertures 8 of the brushhea Obviously the pin 4, instead of being secured in the casing, may besecured in the brush'head and rotated in a ball bearing in the casing.

The features of improvement to which attention is particularly directedare:

The turbine blades secured to or integral -with the back 2 of arotatable brush to project upward from the outer portion of the back,said blades concaved on axes at right angles to each other to receivethe impact prevented.

of a jet of fluid under pressure delivered tangentially inward on them,which blades will absorb the greater part of the energy of the jet anddeliver the fluid within the circle of the blades 10 in a direction ap-,10. proximately opposite to that in which it was delivered to them.

The provision of apertures 8 in the brush head through which the exhaustfluid from the driving turbine is delivered to the brush.

The provision of the baiiie 16 on the opposite side of the turbine vanesto the jet l1 directing the .exhaust fluid downward through theapertures 8 of the brush head.

The provision of an aperture 15 in the cas- 80 ing through which such ofthe fluid as may be thrown from the periphery of the brush head withinthe casing may escape.

And the provision of the passage 18 through which such fluid, instead ofbeing thrown through an aperture 15 may be returned toward the centralpart of the casing `and delivered through the apertures 8 of the brushhead.

The vanes may each be. centrally edgenotched as at 19 topermit a degreeof free passage of. the water driving the brush.

B y reference to Figures 8 and 9 the manner of shaping the vanes orblades is shown. By thus shaping the said vanes the jet of propellingfluid is held more or less confined to the vane pocket thus formed andloss of power resultant from spraying is effectively By actual test, Ihave observed that brushes equipped with vanes shaped as describedoperated in the neighborhood of twenty percent more efliciently thanthose equipped with straight vanes.

It will also be apparent that, by making the peripheral edges of thevanes relatively sharp and providing the edge notch in each thereof, atthe instant the edge of thevane is engaged by the propelling jet theportion of said jet disturbed by the vane is diverted to effective use.If the edges of the vanes were made straight and the notches notprovided the backs of the vanes would sidewipe the jet and reduce thepower. The notches also permit the jet to reach in and strike thepreceding vanes with full force at the most effective impact pointbefore the jet is cut off by a succeeding vane.

ln Figure 7, have illustrated a further modification of the invention inwhich the brush head is grooved as at 2O to receive the concentricallyarranged rings of bristles 21 which in this form of the invention areheld together by twisted wire. As shown, the brush head includes anupwardly extended hub 22 `which rotatably engages the bearing bushing23, the latter being provided with an annular groove 24 for receivingthe sprinv wire mounting @up 25 with which the but is provided. Inthis/manner the brushhead is readily removably mounted, facilitating looquick change from a soft bristled brush to a coarse oneor` vice versa.

What I claim is:

1. A washing brush, comprising in combinationa circular ylorush headhaving curved vanes upwardly projecting around the ,outer edge of' itsupper side, and apertures through the brush head within the circle ofthevanes a casing enclosing the upper part of the hea and downwardlyianged' to ladjacent. the plane of its underside within which casing thebrush head is rotatably mounted,isaid casing having a handle socketprojecting from one side with a duct angularly delivering from itscavity to within the cas- `ing toward the desired directionof rotationLand a bale approximately opposite this duct and within the circle of thevanes, the surface of which baiiie is .curved downward toward the planeof the brush head with its Iconcavity opposite the direction of rotationwhereby the exhaust iuid from the vanes is directed downward through theapertures of the head.

2. A washing brushcomprising in combination a circular brush head havingcurved vanes upwardly projecting from its upper side around the outerlmargin of the head, and apertures through the brush head within thecircle of the vanes, a casing enclosing the uppe part of thebrush headand downwardly hanged around its edges within which casing the brushhead is rotatably mounted, said casing having a handle socket and a jetaperture delivering angularly therefrom into the casing ytoward thedesired direction of rotation and having also a baiile projectingdownward within the circle of the vanes of the brush head to direct theexhaust fluid from the vanes through the apertures of the brush head,and an laperture in the downward ilangein approximately the oppositeside of the casing to the jet aperture.

3. A washing brush, comprising in combination, a circular brush havingvanes upwardly projecting from it around the outer margin of its upperside, said vanes being curved through their length and depth and theconcavity thus formed being directed to oppose a propelling jet, acasing `having a flange peripherall encasing the brush head, means forrotata 1y mounting said brush head on saidV casing, said caslng having ahandle socket outwardly projecting from its edge with a jet apertureleading from the cavity of the socket and directed angularly into thecasing toward the desired direction ofy rotation, means for deliveringthe exhaust Huid from the space ,within the vanes, the said vanes beingalso provided with a notch in the peripheral edge of each thereof inrotative alignment with said jet aperture.

' ROY ANDERSON.

